<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
	</head>
	<body>
		<svg width="200" height="200" viewBox="0 0 200 200">
			<path d="M30 75 Q240 30,300 120" style="stroke:black;fill: none;" />
		</svg>
		
		<!--多边二次贝赛尔曲线-->
		<svg width="200" height="200" viewBox="0 0 200 200" style="stroke:black;fill:none;">
			<path d="M30 100 Q 80 30,100 100,130 65,200 80" />
		</svg>
		
		
		<!--平滑的多边二次贝塞尔曲线-->
		<svg width="200" height="200" viewBox="0 0 200 200" style="stroke:green;fill:none;">
			<path d="M30 100 Q 80 30,100 100 T 200 80" />
		</svg>
	</body>
</html>
